-6.29% is the change from 715 to 670
Calculation steps:
[( 670 - 715 ) ÷ 715] x 100 = -6.29%
Formula
Percentage change = [(670 - 715) / 715] x 100
Subtract the new number by the original number
670 - 715 = -45
-45 ÷ 715 = -0.06293706293706294
-0.06293706293706294 x 100 = -6.29%